我已经创建了Windows服务来发送邮件，并且工作正常，它正在Onstart（）方法上发送电子邮件，但是我想在特定时间发送电子邮件，例如我拥有每个用户的数据来发送电子邮件在指定的时间。
我已经创建了Windows服务，用于通过OnStart（）方法发送电子邮件。
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading.Tasks;
using System.Timers;
using System.Net;
using System.Net.Mail;
using System.IO;
using System.Data.SqlClient;
namespace EmailSmsService
{
public partial class Service1 : ServiceBase
{
Timer timer = new Timer(); // name space(using System.Timers;)
public Service1()
{
InitializeComponent();
}
protected override void OnStart(string[] args)
{
List<Appointments> appointments = GetAppointments();
foreach (var val in appointments)
{
SendAppointmentEmail(val.Email, val.SenderEmail, val.SenderEmailPassword);
}
WriteToFile("Service is started at " + DateTime.Now);
timer.Elapsed += new ElapsedEventHandler(OnElapsedTime);
timer.Interval = 5000; //number in milisecinds
timer.Enabled = true;
}
public void SendAppointmentEmail(string Receiver, string SenderEmail, string SenderEmailPassword)
{
if (SenderEmail == "")
{
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress("example@gmail.com");
mail.To.Add(Receiver);
mail.Subject = "Appointment Reminder";
mail.Body = "Dear Sir/Mam, <br /> Welcome to WHS";
mail.IsBodyHtml = true;
SmtpServer.Port = 587;
SmtpServer.Credentials = new NetworkCredential("example@gmail.com", "nefzvlsehx");
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
}
else
{
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress(SenderEmail);
mail.To.Add(Receiver);
mail.Subject = "Appointment Reminder";
mail.Body = "Dear Sir/Mam, <br /> Welcome";
mail.IsBodyHtml = true;
SmtpServer.Port = 587;
SmtpServer.Credentials = new NetworkCredential(SenderEmail, SenderEmailPassword);
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
}
}
protected override void OnStop()
{
WriteToFile("Service is stopped at " + DateTime.Now);
}
private void OnElapsedTime(object source, ElapsedEventArgs e)
{
WriteToFile("Service is recall at " + DateTime.Now);
}
public void WriteToFile(string Message)
{
string path = AppDomain.CurrentDomain.BaseDirectory + "\\Logs";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
string filepath = AppDomain.CurrentDomain.BaseDirectory + "\\Logs\\ServiceLog_" + DateTime.Now.Date.ToShortDateString().Replace('/', '_') + ".txt";
if (!File.Exists(filepath))
{
// Create a file to write to.
using (StreamWriter sw = File.CreateText(filepath))
{
sw.WriteLine(Message);
}
}
else
{
using (StreamWriter sw = File.AppendText(filepath))
{
sw.WriteLine(Message);
}
}
}
public List<Appointments> GetAppointments()
{
try
{
//System.Diagnostics.Debugger.Launch();
List<Appointments> appointments = new List<Appointments>();
using (SqlConnection myConnection = new SqlConnection("Data Source=xxxxxxx;Initial Catalog=xxx;User ID=xxx;Password=xxxxx;"))
{
string oString = "select ca.ScheduleStartDate,c.Email,os.AppointmentReminderBeforeDays,os.AppointmentReminderBeforeHours,os.AppointmentMissedNotificationAfterHours,os.AppointmentReminderTime,os.SenderEmail,os.SenderEmailPassword from ClientAppointment ca join Client c on c.Id = ca.ClientId join Organization org on org.Id = ca.OrganizationId join OrganizationSetting os on os.OrganizationId = org.Id";
SqlCommand oCmd = new SqlCommand(oString, myConnection);
myConnection.Open();
using (SqlDataReader oReader = oCmd.ExecuteReader())
{
while (oReader.Read())
{
var val = new Appointments();
val.ScheduleStartDate = Convert.ToDateTime(oReader["ScheduleStartDate"]);
val.Email = oReader["Email"].ToString();
var beforedays = oReader["AppointmentReminderBeforeDays"];
var beforehours = oReader["AppointmentReminderBeforeHours"];
var afterhours = oReader["AppointmentMissedNotificationAfterHours"];
if (!(beforedays is DBNull))
{
val.AppointmentReminderBeforeDays = Convert.ToInt32(beforedays);
}
else
{
val.AppointmentReminderBeforeDays = null;
}
if (!(beforehours is DBNull))
{
val.AppointmentReminderBeforeHours = Convert.ToInt32(beforehours);
}
else
{
val.AppointmentReminderBeforeHours = null;
}
if (!(afterhours is DBNull))
{
val.AppointmentMissedNotificationAfterHours = Convert.ToInt32(afterhours);
}
else
{
val.AppointmentMissedNotificationAfterHours = null;
}
//val.AppointmentReminderBeforeHours = Convert.ToInt32(oReader["AppointmentReminderBeforeHours"]);
//val.AppointmentMissedNotificationAfterHours = Convert.ToInt32(oReader["AppointmentMissedNotificationAfterHours"]);
val.AppointmentReminderTime = oReader["AppointmentReminderTime"].ToString();
val.SenderEmailPassword = oReader["SenderEmailPassword"].ToString();
val.SenderEmail = oReader["SenderEmail"].ToString();
appointments.Add(val);
}
myConnection.Close();
}
}
return appointments;
}
catch (Exception e)
{
WriteToFile("Service Failed At " + DateTime.Now + "Due To This" + e);
return null;
}
}
public class Appointments
{
public DateTime? ScheduleStartDate { get; set; }
public string Email { get; set; }
public int? AppointmentReminderBeforeDays { get; set; }
public int? AppointmentReminderBeforeHours { get; set; }
public int? AppointmentMissedNotificationAfterHours { get; set; }
public string AppointmentReminderTime { get; set; }
public string SenderEmail { get; set; }
public string SenderEmailPassword { get; set; }
}
}
}